雅思核心词汇丨boundary、spectrum
1.boundary
[ˈbaʊndri]
n. 边界;范围;分界线
例句
The fence marks the boundary between my property and hers.
那道篱笆是我和她的住宅之间的分界。
Scientists continue to push back the boundaries of human knowledge.
科学家不断扩大人类知识的范围。
短语
boundary value 边值;边界值
natural boundary 自然边界
同近
region;territory
n. [地质]边界;范围;分界线
2. spectrum
[ˈspektrəm]
n. 光谱;频谱;范围
例句
Red and violet are at opposite ends of the spectrum.
红色和紫色位于光谱的两端。
She'd seen his moods range across the emotional spectrum.
她见过他在各种情感间的情绪变化。
短语
spectrum analysis 光谱分析;分光分析
spread spectrum 扩展频谱;展布频谱;扩频技术
同近
extent;area
n. [光]光谱;频谱;范围
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